log_likelihood_shash: Calculate the negative log-likelihood for a shash regression...

In cNORM: Continuous Norming

Calculate the negative log-likelihood for a shash regression model

Description

This function computes the negative log-likelihood for a Sinh-Arcsinh regression model where the location, scale, and skewness parameters are modeled as functions of predictors.

Usage

log_likelihood_shash(
  params,
  X_mu,
  X_sigma,
  X_epsilon,
  X_delta = NULL,
  y,
  weights = NULL,
  fixed_delta = NULL
)

Arguments

params	A numeric vector containing all model parameters
X_mu	Design matrix for location parameter
X_sigma	Design matrix for scale parameter
X_epsilon	Design matrix for skewness parameter
X_delta	Design matrix for tails
y	Response vector
weights	Observation weights
fixed_delta	If not NULL, the delta parameter is fixed to this value

Value

The negative log-likelihood of the model

cNORM documentation built on Feb. 27, 2026, 1:07 a.m.